import fs from 'fs';
// const fs=require('fs');
const readStream=fs.createReadStream('./aaa.txt',{
    start:8,
    end:22,
    highWaterMark:3
});
readStream.on('data',(data)=>{
    console.log(data.toString());
});

readStream.on('open',(fd)=>{
    console.log('通过流将文件打开~',fd);
});
readStream.on('end',()=>{
    console.log('已经读取到end位置');
});
readStream.on('close',()=>{
    console.log('文件读取结束，并且被关闭');
});